Comparison of blue-emitting phosphorescent dopants: effect of molecular energy levels on device efficiency

Jason J. Brooks; Raymond C. Kwong; Yeh-Jiun Tung; Michael S. Weaver; Brian W. D'Andrade; Vadim Adamovich; Mark E. Thompson; Stephen R. Forrest; Julie J. Brown

doi:10.1117/12.564757

10 November 2004 Comparison of blue-emitting phosphorescent dopants: effect of molecular energy levels on device efficiency

Jason J. Brooks, Raymond C. Kwong, Yeh-Jiun Tung, Michael S. Weaver, Brian W. D'Andrade, Vadim Adamovich, Mark E. Thompson, Stephen R. Forrest, Julie J. Brown

Author Affiliations +

Proceedings Volume 5519, Organic Light-Emitting Materials and Devices VIII; (2004) https://doi.org/10.1117/12.564757
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Two blue-shifted iridium phenyl-pyridine dopants are compared in identical device structures. While the dopants have very similar optical behavior, it is found that the device efficiencies are very different and dependent on the host material. Upon comparison of molecular energy levels it is proposed that the electronic properties of the dopant influence the device efficiency through an electron trapping mechanism. It is believed that the relative energetics between the host and dopant play an integral role in the operation of the device.

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Jason J. Brooks, Raymond C. Kwong, Yeh-Jiun Tung, Michael S. Weaver, Brian W. D'Andrade, Vadim Adamovich, Mark E. Thompson, Stephen R. Forrest, and Julie J. Brown "Comparison of blue-emitting phosphorescent dopants: effect of molecular energy levels on device efficiency", Proc. SPIE 5519, Organic Light-Emitting Materials and Devices VIII, (10 November 2004); https://doi.org/10.1117/12.564757

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